TM2, with all due respect, that is absolute rubbish. DST is not making Minimates for collectors to buy as "investments". They are a company who is trying to get as much product out as it can to people who wants to buy it, using the retail channels that they have available, without oversaturating the market.
To this end, the Ghostbusters "Best Of" waves are a big part of that. There are subtle changes to the re-releases as well as to the packaging, for all the completists, but the primary function is to get product back out onto the shelves for people to buy, in the knowledge that the production runs initially sold very well. It's a very sensible policy and one that I would love to see happen with the TRU Marvel stuff.