If you’re really set on nitro then I’d look at a traxxas revo. It’s a lot of fun and holds its value decently well according to my searches on local Classifieds. I sold mine to get a computer and eventually into racing nitro buggies - but always wanted it back.

Traxxas is a good brand without a doubt that will have plenty of parts and upgrades available, solid online community and the 3.3 isn’t terrible - especially with their program to get a new one for a cheaper price through trade in. In terms of learning and potentially messing up an engine, $130 ish for a replacement isn’t too bad compared IMO. Can also upgrade too.

is it the quality and durability of a race brand like my mugen? No. But traxxas is built with the general population in mind so it should be fine!

I had the rustler 2.5 and it was fun but limited because of the 2WD. It’s really fun to make go 70+ with a 3.3 and some upgrades for straight passes.

ive never had the slash, if you’re set on spending <350 for a nitro then the revo and kyosho rtrs are out of your budget. However if you can swing it and have easy pay through horizon or tower - I’d definitely check out the revo for traxxas.