Free for guildies and friends - or polite strangers - if they want "almost" uber items (i.e., +13 skill vice +15, 22 DI vs 25, Lrc 18 vs LRC20). For Uber items, free labor but recipient provides the Major ingreds and PoF.
It is not worth me selling to strangers, using my own major ingredients. Those ingredients are too damned hard to get and chances are when I do need them for myself or friends, then I will be in Luna shelling out millions.
I am an Imbuer first, not an Imbue ingredient merchant. If I wanted to make money off imbue ingrediensts, I would drop them on vendor.
I much prefer giving the prospective customer a detailed list of what they will need to provide. The minor ingredients - gems and MR or EE - I provide gratis. I would never suggest a fee, but rather encourage the customer to pay what they think the item is worth. I have never been disappointed using this "honor system".