My assessment: good investment

Reasons : 1) only available until 9 January 2018
--->will never drop again

2) small amound of them is available on market

3) some got rare pattern
--->peole are interested in skins with rare patterns

4) they are cheap to invest in and in my opinion they are under their
value right now so they could increase quite a bit in price

Conclusion : In my opinion there will be a "hype" on 9th January where the price ot them will increase quite a bit so i would recomment you to buy a few of them before 9th of January.