I’m focused on NES, SNES, N64, Master System, and Genesis at the moment. I’ve just about reached the end of the cheap NES games and bought an Everdrive N8 Pro earlier this year. Mainly for ROM translations and homebrew, but I will admit to playing some of the higher dollar games on it. I’d much rather play actual carts though.
For me personally, I’ve found that I’ll go upwards of $60+ for a RPG or meatier action adventure game, but haven’t so far spent more than that on any of the consoles.
I’ve also opted to buy ports over original games in some cases. Chrono Trigger for example, I won’t spend $250 on it so I bought the Japanese DS port since it was $30 shipped and supports English out of the box.
Tough one - I don’t have a hard cutoff, but I’ve certainly started to slow down on buying retro games. I’ve spent over $200 CAD on a single game in recent memory (2022?), nowadays I wouldn’t really want to go over $100 CAD.
I’ve also been reevaluating and selling off some of my collection whenever I can buy ports / digital versions of some games (eg: Chrono Trigger, bought on Steam and sold my loose SNES cart, Xenogears bought on PS3 and sold my CIB copy, etc).
I only focus on two retro systems - SNES and PS1 - and I don’t really play on OG hardware anyways (Super Nt / Pocket for SNES, PS3 / Vita for PS1), so I don’t mind “owning” digital and ultimately downloading roms if necessary.