I think I got mine through Digikey. It went for $14+ S+H for a 2oz syringe. It may not sound like much but its actually a lot since you do not use much of it. I find it an excellent investment. (I've recapped several boards and did a lot of other projects with it.)

olePigeon said:

I have some generic solder paste.  It's been in my garage exposed to the heat and cold for the past five plus years.  It no longer comes out through the metal syringe part, but I squeeze it out like toothpaste, then apply it with a toothpick.  Still works fine, if a bit difficult to use sometimes.  Still easier than normal solder.

Click to expand...

I thought something like that would happen with the paste. Glad it still works for you. No way solder or it's paste would go bad like moldy bread. (LOL!)