While you still only earn money by bringing Beard these artifacts, you'll get almost double the amount than you would from selling them - so if you have any spare artifacts, fulfilling orders for Beard can be a lucrative affair. You need to have completed Strange phenomenon for Beard before he'll give out requests for artifacts. In most of these cases I've added notes to the mission description that should clarify what the prerequisites are, if any.

you may need to complete other missions first, or meet some other requirement. Please note that some missions might not be available right off the bat, ie. The list is currently not complete, but once I start to work on the walkthrough, they should eventually be added. The list is sorted alphabetically - initially by the names of the persons giving out missions, and then by the actual mission names themselves (as they appear in the dialogue options). This page contains information about many of the optional missions that are available in S.T.A.L.K.E.R.: Call of Pripyat. The Zone Survival Guide - Call of Pripyat - Optional Missions

Stalker call of pripyat the hit