Stating first that this is only my experience, and there are many fish in Silom. I saw your question and asked an ex Jupiter boy who’s had his moment as a highly popular boy. His response to the letter: “depends on the boy”
The offing range in Jupiter has been known to be 3000-5000 for at least 8 years. I don’t see signs of inflation which is lucky for punters though the strong baht counters this. Perhaps you used to be able to ST less popular guys at 2500 pre and just post Covid but no longer.
5000 is either LT or ST for an in demand guy who already has an established clientele willing to pay this, and no immediate money issues. Unless the guy outright quotes you 5000 though, it is fair to assume ST is 3000-4000.
No 5000 isn’t a brush off fee. The guy is trying to make a little more money (or maybe you look like hard work), or preparing to negotiate. You can try to counter offer 4000, there’s an 80% chance of them agreeing. I’ve seen guys quote 8000 or 10,000 when they truly want to give someone the brush off or “if you want me this much, this is what would be acceptable” from straight stunners to accept a gay off.
Look, Jupiter is known to be a “premium” bar but the downside is the offs don’t happen as fast as other bars. Boys have to charge higher to make their monthly expenses, since they get one off per day or once every 2-3 days instead of two offs per night. Economies of scale and all that. If you want to challenge that, go to another bar.