>>48166165We are in the midst of a speculative bubble with retro games. Prices will only continue to rise. There are two recommendations I will give.
1. If you absolutely must play on hardware, get a flashcart, they range in price and quality. But an EZ-Flash Omega is the cheapest for price to features. Won't have the authentic feel of an official cart, but its not $300+
2. If you're fine with emulation, then its fine, most GBA emulators are mature enough that any inaccuracies are few, i'd recommend m GBA
Do those things and wait for the bubble to burst, once it does, have your wallet ready, and laugh at them.
