budget???
I guess I need both ends of a reasonable budget. Does a $100. gun really shoot like a $400. one?
What are you shooting?
Depends. I've got a $110 Beeman Sportster with a $50 BSA airgun scope by the back door (left out of the safe). But I've got a $375 RWS/Diana 350 with a $200 Bushnell scope in the safe. They both work at killing vermin. I'd much rather be shooting the RWS (quieter, better trigger, more accurate), but I'm not leaving it out, by the back door for opportunistic shots.
I can tell you what I would get any any particular budget. But realistically, you have to narrow down the budget for us to help you figure out the best you can get for XXX dollars. Can you spend $100, $125, $150, $175, $200, $250, $300, $350, $400, $500, $600, $800, $1,000, more, what?
So to answer your question a little better:
Does a $100. gun really shoot like a $400. one?
No it does not! But it might be an acceptable compromise, depending on what you're trying to do with it, and how much "luxuriousness" and longevity you require from your airgun dollar.