Do yourself a favor and contact Nick [MENTION=41828]Minnetonka4me[/MENTION] he will sell you a good used set at a reasonable price, honestly that set on e-bay (with the grey fuel lines) look very questionable, and too much money.
Yeah, they are expensive, but if you can find another set for less, let me know.
I would say as far as suspicious, I removed them from a one owner 99 SPX that had never been off lake Sinclair in its life.
More specifically, the carbs are going on a 96 Seadoo Challenger. The reason I am replacing is because the previous owner removed some parts and rigged up an electronic fuel pump. The setup did work BUT I have talked to a few people who agreed the carbs are not setup for that type of system. I am trying to take everything back to the stock condition for piece of mind. Thanks for the PM Matt, info sent back.