There are better & worse online options. Ebay has a number of stores selling singles for fixed prices - just be very careful about shipping costs. One store might sell the minis for $1.50, and ship a dozen for $10; another might be $1.29 per, but ship a dozen for $60. Check.
Given the product's been out of production for almost 8 years, that's a down. Given they produced literally millions of the minis, that's an up. Completism may be impossible barring major lottery wins - eg. I have a couple of pre-production minis that lack combat stats, including one that never appeared in the MW game, but appeared in BT as the Eldingar. How many of them are out there ... ???
(I ain't selling mine ;) )
W.