Not quite sure what you are asking, but I have used several of the eBay pre wired sellers for both my P-Bass & Jazz Bass. The P-Bass is the 'Texas Mojo' cap on standard 250 ohm pots, quality of workmanship is excellent and it installed very easily; the Jazz Bass has a '62 replica cap & pots/wiring, and again the sound/quality of workmanship & installation was great. That being said, I have moderately good soldering skills, and did a good job with the shielding, etc. So, if you can do that, I say go for it! The alternative would be to assemble and build your own electrics from scratch, which is easy to do because the components and wiring diagrams are readily available.
Fender Rumble Amp Club #63, Fender P; Fender J; Jack Casady Limited edition, Rumble 350 Combo; Ampeg PF-500 & Ampeg 410 Classic Cabinet; Crappy Bassist w/Expensive Equpt. #304