You explained it yourself. New wheels of the identical model are as little as $130. Are used tires worth the difference? No warranty? No history of the maybe 300 pound dude that rode them 'easily'? No idea if they are as good as the newest, lighter versions?
Buy the new versions. Buy Vueltas. Buy Mavic Aksiums. Buy Shimano RS whatevers. Buy...
There's a metric [censored] ton of really decent 'cheap' wheels out there. Someone will say something good about them and the next guy might badmouth them. Read the online reviews and go from there. They're really helpful as the data set is larger than just me or a couple other guys on a BBS giving you our limited experience with wheel 'X'. You'll do better than trying to negotiate an eBay return if something goes South and you'll have a new pair of wheels / tires for the same money or less...and a place to return them to if need be.
Now, if you really want my 2 cents worth...I'm a light weight dude with minimal Wattage that still manages to abuse my wheels. I train hard and race harder. For cheap, I like the $200 Aksiums. Note that one other guy on this board (at least one other) has had a negative experience with Aksiums. He's heavier and more powerful than me. There you have it.