To expand using the shopping example, imagine being a player and seeing that Lightning sword you want to buy. You also see a holy-imbued talisman which could be very useful in your next adventure featuring tons of undead. But you can only afford one at their retail price. Well, you simply want to ask the merchant if you can get that item for a lower price, maybe suggesting your accolades and service to the community. The merchant lowers the price, but you're still not able to afford it.
It's an interesting decision point to continue or accept the price, but it's not necessarily "fun." However, losing out on one or the other might reduce your enjoyment or comfort in the future.
Similar situations happen all the time for players and while the DM can try to expedite the procedure, some DMs might imagine that doing so might remove agency or remove the opportunity for players to RP their character to their content.
And while you can talk about it, player might not have a big enough grievance with the session to make any note. Even if you ask, they may just respond with "yeah, it was fun. I liked it."