Coming back to the hobby after so many years, do you still have preference for Kyosho buggies? If yes, then explore their Ready sets of ebuggy.
If you can stretch your budget a bit more, take a look at the MP9E Evo 2 Readyset, this may not be the latest one from Kyosho but it's a pretty decent platform for you to start your comeback. The MP10E Readyset is the latest platform but that's above your budget though.