I've been doing this for so long that I have a huge grouping of extra die varieties I find in rolls. Many of them either go for sale on lincolncent.com, or I give them away to youths, trade them with others, etc.
The leftover coins end up in tubes where I assemble full BU rolls and keep them aside until I have a few hundred, then I dutch auction them on
ebay. I sell them as uncirculated roll groups, mixed dates with duplicates, 100 rolls for $100 post paid....and I always sweeten the pot with rolls that have $3-$4 value such as 1965, 1966, 1967, 1969, 1971, etc. For the people just looking for BU coins to fill sets to sell or something like that, these are a steal.
Any leftovers from substandard, spotty rolls end up at the bank.
If I find RPMs in a roll, such as the 5 examples of 1964D-1MM-009 I found in the 1964D roll, I generally get on average $3-$5 per coin for them. I would have paid $1-$2 for the roll, and I sell the remains (on average) for $1. That ends up bringing close to $25 profit from the one roll. It makes up for the losers I get, because I often get nothing from a $1.50 roll and sell the roll back out for $1. Other times I open a $1-$2 roll, find nothing, and decide the roll isn't of quality to resell, so I dump it at 50c to the bank. The profit from the spoils of good rolls make up for these slight losses.
Once in a while I hit it big, like a 1956D roll that cost me $5 which contained 12 examples of 1956D-1OM-002. I sold 10 of them at $25 each ($250), refilled the roll and sold it for $4. A roll of 1964 cents that cost me $1 contained 9 examples of 1964P-1DR-001. I sold 3 of the DDRs for $75 each, and rebuilt the roll and got the $1 back.
If you hit it big more than you bomb out, you'll be one lucky cat. My bigger hits are usually one in 500 rolls, small hits are one in 10 rolls, break-evens are about 6 of 10 rolls, and complete wastes of time and energy end up being on the order of 2 or 3 of ten rolls. They are the ones I buy at $2-$5 per roll and sell back out at a loss or take to the bank because the coins are ugly.