Many libaries also need to sell consumables alongside loans of regular items; Lend Engine makes this easy.
As well as adding loan items to your database, you can add stock items, which can be sold to members. Great for consumables like fluids, accessories, or even just fixed add-on fees which you may charge.
Using the Lend Engine's powerful multi-site capability, you can see how much of each item you have in each location.
Charge for stock items, or charge nothing. Or charge to only certain members; it's all configurable. Users can add stock items to loans and reservations themselves (if you have self-serve turned on), and you can add items retrospectively to loans created earlier by members, when you check out.