I don't think this is a CB, she's not asking for something for nothing, she's just offering a trade and her trade offers aren't terrible for a beanbag. Personally I'd take her up on the firearms lessons, I think that's great, but that's just me. If you don't want to trade then just say thanks but no thanks, you're looking for cash only, you're trying to save up money, bla bla bla. Then maybe add 'no trade offers please' in the listing.