From what I can tell so far just being out of print and a couple of years old made the sealed prodcuts go up in price but this also means you have to hold on to most products at least 3+ years.

Also I am a bit concerned about the market depth. When it takes 1 year to unload a couple of boosters and you make 20 dollars per booster box if this is worth the hustle and to lock up the money.

I jumped into it though and will know more in a couple of years but also invested just a tiny bit to test it a bit. Also I want to start tracking the sells on ebay a bit to get a better feeling.