Last count I had more than dozen different powders on hand for shotgun. Only four or five for low pressure. Primers, I have seven different brands, wads maybe 20+ different ones, hulls must be eight to ten different options in 12, less in small bores. Reloading is easy but it can get complicated real fast if you load for multiple guns, different games, different ga., even different shot sizes and pay loads.
7625 is still out there in some of the smaller gun shops. Bought a can two weeks ago but it was the last one they had. Loaded it up for a Lefever which loves it. $20 for the can which was not bad I thought.
I use PB a lot for low pressure loads. About two months ago I put out the call for any that was sitting around and ended up with four eight pound kegs. I paid from 140 to a high of 200 per keg( average of just over 160) and some will think that too much but I spent twenty years getting safe loads for any of my guns with that powder and had no desire to start over. That will run me for the rest of my shooting life I suspect.
Armslist, trap shooters.com, basic internet searches for forum threads about hard to find powder have all generated leads. I found one small dealer with a web site, on that he had a link to Facebook and who had a Facebook picture of .22 ammo and also showing PB sitting on the shelf in he background. Picture was recent, sent a email and sure enough they had two jugs. Wanted 230 each but ended up selling it for 200.00 each because the were getting out of stocking powder and this was on the shelf for two years or there about. Point is get creative and you might find a few pounds of powder still and that will run you for several more years. I'll keep an eye out for you if you want.