If you've ever looked for yarn at thrift shops then you've probably seen the BIG BAG OF ACRYLIC:
There is an astonishing 17 skeins of acrylic stuffed in that bag -- not the quality kind. But this is why I turn the bags over and take a good look:
Hidden at the bottom is a 100 g skein of sock yarn, enough for a pair of socks, and two skeins of Lamb's Pride worsted.
I paid $5 for the bag. The three skeins I'm keeping would've added up to $29 if purchased at the LYS. Good deal!
Of course it's only a good deal if I'll actually use the yarn. Lately it seems all I find at thrift shops is acrylic, so I steady myself when I find wool and seriously think about how it could be used. Don't buy it just because it's there! I have no problem walking away from nice yarn at the Goodwill if it doesn't seem like something I'd use, and hopefully it makes another knitter really happy.
What to do with all the acrylic? My mom gets first dibs for her school's craft projects and the rest is given to a priest who collects yarn for a prison knitting program.
Bonus: The sock yarn* matches my sweet kitty Sophie. :)
*my guess is Trekking, let me know if you recognize it as something else