2010 does not have the magnum trusses. It is flat roofed. This style roof are known to sag where the AC unit sits and water to pool. If the AC seal is old the water can leak past. The seal is easy and cheap to replace.
If your serious about the unit. When looking at it, remove the inside AC cover to access the foam air filters. Look up at the roof (have a small flashlight) and inspect for signs of water infiltration at the roof opening. If you see signs of water on the roof framing, I would run fast. If not, look up on the roof. The roof is safe to walk on, but there is a lot of flex. Look for signs of water pooling around the AC unit, again a sign of the roof sagging. Also inspect all of the roof caulking. There should be a lot of signs of the caulking being touched up over the years. Lots of shades of what was white. If you see lots of dry caulk, open cracks, etc, and no signs of fresh touch up caulk over the years. That is bad. any tiny opening water can enter the TT and cause major rot, and extremely expensive difficult repairs.
As for your original question about the X213 slide leaking. I do not recall any posts about people having that issue.
If you do purchase a flat roof TT, make sure to replace the AC seal. Parts will cost about $25, and an hour or so of time.
https://www.jayco.com/files/download...ilename_59.pdf