I get the feeling that the high sticker price for the donated equipment is more an artifact of western military procurement processes than a measure of how much

I get the feeling that the high sticker price for the donated equipment is more an artifact of western military procurement processes than a measure of how much stuff they are getting. If you consider tanks, for example, the donations tend to be in the low double-digit range. The single biggest contributor is actually Russia, since the Ukrainians have captured quite a large number. They also had really big reserves of all sorts of equipment before the war.