You have a few options but it all depends on what you want to achieve.
Let’s go through the options
1) If you have the time to photograph, list, then pack and send them to buyers then put them on eBay. Your return or profit (since you got them for free it is all profit) would be the highest with this option. The downside is it takes time and (hard) work.
2) If you don't have the time and don't want to deal with that, since you're basically “free rolling” and anything you get is a profit, sell them to a dealer, but don't expect to get the same money…
Things you need to consider before choosing one of the options.
a) While on the subject of money/profit it all depends on what albums/stickers you have, just because they are old it doesn't automatically mean that they are valuable. There must be demand for them on the market for them to be valuable. Old Panini football collections usually have demand on the market, other collections/stickers not so much.
b) If we are talking stickers without complete collections not a lot of dealers will be interested in thousands of them because they are difficult and expensive to sell (eBay and shipping fees) if they don’t have a brick and mortar store, where there is no such fees if local collectors are buying from them.
IMPORTANT: Obviously such an argument would not be valid if we are talking about FIFA World Cup 1970 or other 70s and 80s Panini World Cup stickers, then you hit gold (or as close as you can get to that with albums/stickers).
So what I would suggest is that you take a few albums and check if some of them were sold on eBay in the last couple of months, in that way you will see what you have (enter their name and check sold listings).
Once you know that go to the option 1) or 2) or maybe decide to keep them, but first tell us that they are in fact Panini World Cup 1970 so that the forum will go nuts.
Fingers crossed that they are
