I've bought two new basses recently. A Sire arrived from Thomann with the most perfect setup, no complaints at all, ready to play out of the box. I bought my MM Stingray in Wunjo's, it was nicely set up in the shop, so no complaints. They did me a full set up for free and I get that for life from them if I can haul my bass back and forth to London! However if the action was ridiculous or intonation off I wouldn't gave hesitated to ask them have a look because it was a serious investment and I want to properly test drive it. If I were just tinkering with no intent to buy I wouldn't bother but if you're serious about buying an instrument I expect the shop to help and the customer to be able to wait a short while.