You should be able to buy the same wheelset without stickers for under $600.

Where?

What is the rim depth?

Which hubs and spokes are they built with?

My evaluation baseline would be new Flos for $1,150. These used no-name wheels are only discounted $350 from new Flo wheels. Does that feel like an equitable adjustment? To me, I would want 50% from Flo to justify the used and likely lesser performance and quality.

Don't have any personal experience, but Rider is local to Memphis and several folks I know use his equipment.