To put a positive spin on it, you can use these issues to your advantage in price negotiation (especially with used gear, where the profit margin is generally 50%+). I've done this numerous times (and had it done to me WAY back in the day working at $cam cAsh). I can honestly say that I've never purchased a bass that was Ready To Go exactly the way I wanted it right from the get-go. The vast majority of basses require a little tweaking depending on the player's preferences anyway. Knowing that, if something with an instrument is "off," but it's otherwise solid, I'd bring it up with the salesperson and mention that you'd have to put money into it to get it up to par. Have them knock the cost of a setup from your tech of choice off of the selling price, and use the cash saved to tweak it (or get it tweaked). If your tech is worth his salt, you're going to end up with a better setup than what was done at the factory, anyway, and to your specs rather than generic.
If they don't wanna play ball, then perhaps they don't wanna pay their gas bill that month, either.
If they don't wanna play ball, then perhaps they don't wanna pay their gas bill that month, either.