Neither is particularly fantastic for that price. The technics is a hell no, even if in mint condition with remote I'd pass. I'd pay maybe $50 for it if it was new in the box. It's not a very powerful receiver to be sure.
The Onkyo is much better than the Technics, if it was mint, had the remote, I'd say it's alright for that price, but not a bangin deal or anything.