I've just won a few auctions on eBay and am now awaiting delivery of what were described as "120 WWII tanks and trucks, 20mm". Having looked at the photos they were clearly 6mm scale and modern, not WWII. Some at least are Soviet - there are a couple of those big, truck mounted radar vehicles. There are also 18 assorted aircraft.
Works out at 18p a model. I'm looking forward to the lucky dip element of this. I'll post pics here when they arrive.