I play a 14th wizard with (Scribe Scroll, Craft Misc. Items, & Forge Ring) and my cohort has Craft Wand. We sell items to the group for full market price, unless I feel that the item would really take the burden of spellcasting of of ourselves. To that effect, I buff up or create magic tiems that would help out with hit points (i.e. + Con items, + Res save cloaks) as well as specific items to help my survival (like a ioun stone to store spells). I also give bulk discounts as well as "payday loans".
I know it seems cruel to charge your own party (or offer a loan), but it is my xps I am spending. There is only soooo much a wizard can take being a magic-whore (pardon my French) before you lapse too far behind the rest of the party in xps and then die and lose even more xps. Vicious cycle it is.
And remember that the conversion rate for xps to gold should be 12.5 gp to 1xp spent, on a good day...
That was my 10 cents. My two cents is free.