Most of my slings were sent to me as gifts or were swaps... I don't think that I've bought any of them, certainly not full retail.
I have:
A denim-style Maya Wrap, size M. It's not super pretty, but it is the most convinient thing *ever*. I used it all the time with BooBah even though I would probably be better off with a large (I found the tail to be a bit short when it came to adjustments, and it was impossible for Mike to wear at all). I'd be willing to part with it for something just as utilitarian but with a longer tail.
A denim-style Over-the-Shoulder Baby Holder, size L. Fits me well, but I would prefer a bit more adjustability; I'm not a big fan of the padding, but BeanBean and BooBah both loved it so it saw a lot of use, often in conjunction with the Maya (Bean in the OTSBH, Boo in the Maya).
This one I'd also be willing to trade, again for something very useful but perhaps easier to adjust (unconstructed).
A Kangaroo Korner fleece pouch, size L. Very comfy and warm! BooBah rode around in this constantly her first winter. I found it to be an absolute necessity, and even though I prefer ring slings to pouches (I'm all about adjustability) in general, I don't think that the fleece would make a great ring sling, and I loved having the extra warmth. Wearing BooBah in it was like wearing an extra sweater with a hot water bottle inside... seriously cozy!
A Baby Bjorn-- Hasn't been used in ages; MIL bought my first sling (a Kissasling) when BeanBean was 12 months old, and I had put the Bjorn away long before that. I keep meaning to sell it, but I haven't gotten around to it yet... I guess it will happen at the Yard Sale that I'm actually going to hold this spring. I think I'll be very happy to get $2 for it.
A really excellent sling who's name I can't recall... I bought it from saritasmile here at MDC. It's a ring sling, soft sage green with lavendar trim and a moon and stars on the tail. So pretty!
I absolutely love this sling, and I always get compliments on it when I go out.
The tail length is a teensy bit long for me (I'm short
), but it's so easy to adjust and so pretty that I absolutely love wearing it; it's long enough for Mike to use comfortably (he's a big guy), so I wouldn't want it any shorter.
If it was a teensy bit heavier/warmer, I'd use it all year round.
This is my favorite sling, and I wouldn't part with it for anything except perhaps another just like it.
I'll see if I can get some pictures of one of the kids wearing it, and if you like it you can PM saritasmile and ask her about them; the sling is super-sweet!
A BlueBird Baby sling, made by another WAHM here (Lizabird, perhaps?). Warm flannel, ring sling with padding. I love this sling dearly, too, but since I lost some weight it has been too big for me.
It still fits Mike quite comfortably, though, so we're hanging on to it.
This is the most comfortable sling that I have, as far as Mike is concerned.
The one thing that I'd really like is a Solarveil sling, ideally in Maya or Sarita's style.
I'd like to have two of them, for showering/bathing and swimming, so that the one didn't get worn out from being used every day.
I had a really difficult time before BooBah was big enough to sit by herself in the shower (90% of my showers are taken with both kids; at least, they were before BeanBean could be trusted for 20 minutes), and I desperately longed for something breatheable on our annual trip to the beach with the ILs. Actually, there were several times over the summer that BooBah was born and the following summer that I desperately wanted a lighter, more breatheable sling...
Still, I think of it as a luxury; something I'd like to have, but it's not absolutely necessary, so it'll wait.
.
) and a Zolo midnight blossoms solarveil. And, if pushed, another FH. 
Dh will probably balk, but he was the one who said (when I was originally freaking out over the +hpt), "You'll be fine! You already use a sling!" 
); I've gotten a few things FSOT too. The Zolo was full price 
