It kind of depends on where you live. What are you, Finnish? EDIT: Ah, Turkish. Google squat rack, power rack and so on combined with the turkish word for buy, "for sale" or something like that. Do you have an equivalent to ebay? Look there. Ask the gym where they bought their equipment.
Weightlifting is a somewhat big sport over there, no? There's got to be a national distributor of exercise equipment.
You can mostly get an estimate if you go to a site, click add to cart, checkout, fill in shipping details and then you get an estimate. But shipping is of course pretty expensive. you should be able to get something pretty decent for a lot less than 4500 dollars though.