@msolga,
Oh, hon, you've just hit upon one of my all-time-favorite hobbies! In the US we call them "thrift stores" (or I do, anyway).
I spent almost 5 years buying vintage needlework items (pattern books, yarn, thread, whatever) at local thrift stores, and selling them on eBay.
I did fairly well with that micro-business. (In this US economy, I've recently discovered, this no longer works!)
I love thrift stores! These days when I go to Wal-Mart, I get "sticker shock" at a $10 shirt. (I think, OMG, you'd pay $10 for that piece of crap? It's not even linen! It's nasty polyester!)
Just last weekend, husband and me finally found the loveseat and coffee table we've been seeking for several months:
At a local thrift store (Florida), we bought the loveseat for $37.50; it was made by Klaussner in NC (US). The coffee table, which is solid wood (NO pesky veneer, and quite heavy) was $12.50. It has a 1974 date underneath.
So, yeah, $50 US for the set. A bargain if I ever saw one.
My happy thrift-store purchase about 3 weeks ago was 2 pairs of slacks, made by the Flax Clothing Company. New, they'd cost $65 each. Used, and on sale at a thrift store, I paid 50 cents each.
This is SUCH a huge discount I can't even figure it! I adore these slacks, too, in 100% linen.
I can sew very well, and so I modify much of the clothing I get at thrift stores. I can buy 100% silk (or linen) slacks for maybe $2, and put a drawstring in them, taking maybe 5 minutes, and save myself $100. No, really!
I think of thrift stores as a treasure-hunt. With knowledge of what can be cleaned up, you can really rake in the dollars!
I once got an herbal book for free, when a local thrift store was closing. I auctioned that book off on eBay and got $150 for it. (It had an addendum by the author's wife, so it was a rare book.)
I also auctioned off a Coach-brand purse, which I'd gotten for 50-cents because the zipper was broken, and sold it for $35.
It was great fun with eBay, but frankly a lot of work... and as I said, with the US economy so bad these days, such plans no longer work. For my own purchases, however, I still haunt all of our local thrift stores, and I do very well there (and love it!).