Do you live near a chain of Hastings, the entertainment store in the US that is also America’s biggest direct market comic store chain?
It might be worth checking.
Walk in and buy a copy of Star Trek: The Next Generation/Doctor Who: Assimilation #1, the Hastings cover variant, as seen below, for $3.99. I understand they should have plenty.
Then go to eBay and sell it for $25 to someone who doesn’t live near a Hastings.
Rinse and repeat.