Ask him how he and his cart got up here all neat n' stuff.

: How'd you get that big cart up here?

: Oh ho ho! You needn't worry about that, my boy! All you need to know is my wares are well priced and that my mustache is fabulous.

: Er, okay. So what sorts of wares do you sell?

: All sorts, my boy! You're welcome to take a look. First item's free!

: Who the hell can turn down a free item?!
Red Item - A box of two Diamond cards
Yellow Item - It's a book. The cover reads "Book to Imagination! Discover your inner thoughts and how to use them!"
Blue Item - A gem
Purple Item - Pack of bottle rockets (6)
Shovel - It digs stuff.
Menen himself will choose what and what not to purchase, just as an FYI. You can suggest things though