If you buy a bus in a station it won't let you select the bus until you select another ship from your inventory. Log with verbose 8 logging has been sent to Raybondo's inbox. Check for details.

I've also had this problem. I've also had the problem of having to purchase 3-4 buses to get ONE to appear in my inventory. The others are like taxes or something...

Well, I unequipped three busses to get the free cannons (for a theme duel), and couldn't sell the three I had. They stayed in my inventory. This seems to be new.

There was a bug a while back where you couldn't sell a special ship bought in s18 or something. I wonder if that's still around or if that has to do with this bug. Weirdness.

Try this: If you purchase the bus and it either doesn't show up in your inventory or doesn't let you select it, log off and back on again. See if that works. If so, I already have it fixed and it's waiting to be released. If not, then it's a different bug.