Hi Yoni,
Shekhar's comments in paragraph 2 are very similar to what I have to say. When a PI wants to donate to a core, it's often because they cannot afford a service contract or the instrument is close to "end-of-life" for support. I have also seen PIs offer to donate equipment, because they don't have space for it. Before accepting a donation, it's important to understand if there are other users for the equipment, the costs to maintain it, and what the remaining lifetime is for the instrument. I've had PIs offer to donate something that needs repair or that's outdated, and it would become a burden for the core to maintain. Also, we typically don't accept equipment if there's only one or two users of the equipment.
As far as usage fees go, we typically charge the donor the same rate as other users. If the core has to pay for service contracts and upkeep, then all users should share in the cost. An exception may be made if the PI consulted with the core when making the purchase or writing an instrument grant, but in such a case, there were discussions before the equipment was acquired. If the PI acquired the instrument without consulting the core, we have the right to refuse the donation or to charge the donor. I suppose there could be a situation where we would offer some temporary free usage of the equipment to the PI, but it would depend on our costs to maintain the equipment and the amount of revenue being generated on it.
I have also seen multiple PIs donate an instrument to a core and then ask to take it back or want to argue with the core. So put any agreement in writing!!!!! I cannot emphasize this enough.
Hope that helps!
Anthony
Anthony S. Stender, Ph.D.
Microscopy Core Manager
Creighton University