When I sell on

I frequently start my auctions low, but I still make money on my supplies. Now, you've all seen my stash, but I buy a lot of estate sales and "store going out of business" liquidations, so my cost per yard tends to be very low for fabric and trims. I can usually balance this out with items I may need to buy to finish an outfit.
For example, this dress for my DD cost me approximately $.28 in supplies to make:
THe blue and white fabric, I bought by the pound on a roll, each roll still has MOST of the roll left, and I paid $5 for one whole roll and $11 for the other. The stabilizer on the embroidery was a bulk purchase where I got all of the stabilizer of a person who closed their embroidery business for $187 including shipping. (we're talking 100+ things of stabilizer). The thread, I bought a set of 480 threads with a rack, and used not much. The piping was from a bulk estate sale. I get embroidery bobbins by the case, etc etc. The most expensive thing on that dress is the serger thread.
IF I were to sell the blue dress (I'm not, DD spilled juice on it at christmas, can't even re-sell!), I know it took 4 hours including embroidery. I would probably start the dress at $20. That's a little less than $5 an hour for my work. Any increase in bids increases my per-hour intake, but I still make a profit at $20.
The big thing that takes time is applique. I have a sewing machine that can applique up to 6"by15" while I just add on fabric as it's called for. People who applique by hand, it takes a LOT longer, but often, they can have more intricate appliques. Thus, the price goes up. You usually won't see intricate appliqued outfits on

for less than about $50+.
There are a lot of

sellers who buy fabric in bulk and/or wholesale, or they are members of fabric co-ops. Some fabric suppliers will give you a deal if you buy a whole bolt, so they don't have to cut the fabric. Some manufacturers will give you the same prices they give smaller quilt shops, if you contact the manufacturer directly and have a wholesale number.
Sorry, this got long winded and preachy, and I didn't mean it to.
I hope this helped, even if I sound like a mean text book lady.