His x-wing is relatively small, comparatively! There's most definitely no room for something like the Falcon, but the X-Wing would be fine, if that's what you wanted for him. Mind it can't really fly while in town, but if he made a friend of someone who can shrink things down to size, he could most certainly go cruising through the doors. :)
In terms of bad, I am a little less good at this. I don't think anything Vader related would really do it for Luke at this point, since he's come to terms with and fixed this situation as best he could. (he is from after Jedi, right?)
Maybe a power converter from Tosche Station shows up. RIP Uncle Owen and Aunt Beru, the most smoldering of skeletons. >_>