When you're shopping for DJ equipment, the easy part is picturing the setup you want. The harder part is deciding between a new part that solves one problem and a used or broken unit that could keep other gear alive. Each of these four listings takes a different angle on that decision: one is a small replacement knob set, one is a specific turntable part, and two are complete decks sold for parts or repair. Prices span a wide range within these four listings, and the right call depends mainly on what you're fixing and how much hands-on work you're ready to do.
Quick take
If you just need to refresh worn controls on a mixer or controller, the 5-piece knob/fader cap set is the lowest-priced listing in this group. If you're restoring a Numark TT-1520 and need the tonearm lift guide, that targeted part is the direct model-specific buy. For a full turntable project, the Numark TTUSB offers a complete deck in untested parts/repair condition. At the top of the price range, the Broken Denon DN-S3500 is sold strictly as a parts donor for a 1-channel DJ turntable.
Listed price comparison
| Listing | Listed price | Price bar |
|---|---|---|
| 5Pc/Set Knob EQ Fader Cap for Pioneer Numark Rane AKAI DJ Controller Mixer Parts | USD 8.24 | |
| Numark TT-1520 Turntable Parts - Tonearm Lift Guide | USD 12.00 | |
| Numark TTUSB DJ Turntable USB Audio Interface TT USB UNTESTED PARTS/REPAIR READ | USD 49.99 | |
| Broken Denon DN-S3500 1-Channel DJ Turntable For Parts Only | USD 64.99 |
Where each listing fits
| Your project | Best fit in this set | What the listing offers |
|---|---|---|
| Quick refresh of mixer knobs or fader caps | 5Pc/Set Knob EQ Fader Cap | New set of 5 plastic caps in mix color with Pioneer compatibility |
| Repairing a Numark TT-1520 tonearm | Numark TT-1520 Tonearm Lift Guide | Used part made in Japan in a TT-1520-specific listing |
| A turntable you're willing to service | Numark TTUSB | Belt-drive deck that powers on, 45 adapter and USB cable included |
| Donor deck for a Denon DN-S3500 | Broken Denon DN-S3500 | Unit sold for parts only with no box or accessories |
Product notes
5Pc/Set Knob EQ Fader Cap for Pioneer Numark Rane AKAI DJ Controller Mixer Parts

The set of 5 plastic fader/knob caps at USD 8.24 is the cheapest way into this group if your mixer or controller has lost a knob. The caps come in mix color, meaning a multicolor batch rather than a uniform set, and the compatibility range includes Pioneer, Numark, Rane, and AKAI. They're new, plastic, and made in China, so they're a low-risk refresh for worn or missing controls. The catch is fit: you need to compare the cap to your actual knob or fader shaft before expecting a secure seat. The low price also keeps the experiment cheap.
Numark TT-1520 Turntable Parts - Tonearm Lift Guide

For someone restoring a Numark TT-1520, this USD 12.00 used tonearm lift guide is the most direct match on the list. It's a model-specific part made in Japan, which makes it a sensible target if the tonearm lift on your TT-1520 is the broken piece. The used condition carries expectations: parts may need cleaning, old capacitors may be out of specification, and potentiometers may need deoxidizing. That makes this a part for someone who services gear rather than drops it in. It's also a single part, not a full turntable, so the scope of the project stays narrow.
Numark TTUSB DJ Turntable USB Audio Interface TT USB UNTESTED PARTS/REPAIR READ

At USD 49.99, the Numark TTUSB is the mid-price full deck in this set. It's a belt-drive turntable in silver with RCA and USB output, a built-in phono preamp, and pitch control, and it includes the 45 adapter and USB cable. The turntable powers on, and that is the extent of its tested condition. The cartridge is included with the cover, though the needle may not be connected. If your project is a turntable with USB audio output and you're comfortable troubleshooting beyond power-on, this gives you a complete deck to work from. The reasonable caution is the untested state: treat it as a repair project, not a plug-and-play turntable.
Broken Denon DN-S3500 1-Channel DJ Turntable For Parts Only

The USD 64.99 Denon DN-S3500 is the clear parts-donor listing in this group. It's a 1-channel DJ turntable that's broken and sold for parts only. No box or other accessories are included, and there's no manufacturer warranty. Two serial numbers are listed, and you receive one unit in similar condition to the photos, matching one of those serial numbers. This is the listing to pick if you own a DN-S3500 and need internal parts, or if you want a donor deck from that specific model line. It's not presented as a repairable player; it's for parts only.
Final recommendation by use case
If the goal is a quick cosmetic fix on a mixer, the 5-piece knob/fader cap set is the easiest call. For a Numark TT-1520 owner with a tonearm problem, the tonearm lift guide is the focused buy. If you want a complete turntable project with USB audio output and you're ready for repair work, the Numark TTUSB is the one to read closely. And if you're maintaining a Denon DN-S3500 and need a parts deck, the broken Denon is the explicit pick for that repair path. Match the listing to the part you actually need and the amount of work you're willing to do.