well generally we're against buying slings.
Apart from the cultural items like the south america slings - the quality of slings advertised on the internet tends to be a lot lower than one you could make yourself in a few minutes.
Given that all you need are 2 bits of string and some strong fabric (or a plastic bag lol) the commercial selling of slings is usually a major rip off.
If you would like to start a thread in the general section - go ahead. there are quite a few that deal with slings for sale - and generally we're quite derisive of the quality and price.
But again people have posted sites where you can buy some decent cultural slings.
HOWEVER. The best way to get a quality sling at a good price is simply to ask a forum member who makes them and either swap something (in the trading section) or make a deal with them via Private Messages.
If you see a sling design you like simply ask the person who made it what they would like to make you one.
I know this works as all my braided and fancy slings were acquired this way
But we're not going to set up a seperate section for people selling slings. Hopefully the above will solve that problem for you anyway