i havent sold anything as yet - i've been giving stuff away and mostly making for my daughter
although my dh has bragged about the stuff when dd is wearing it and people seem impressed (i always wonder if its just being polite though)
i have seen things that are sold and have met folks that sell things
you may want to wander thru the messages boards at www.sewingworld.com
theres info there on pricing/business etc.
beyond that maybe look through issues of 'threads' 'sew news' 'creative machine embroidery' magazines (some are online)
if you want you can email me at LDYBLUNH@AOL.COM
if you want more info; it is one of those hobbies that has a way of expanding before your eyes in terms of supplies. you can do it with less, but have to have discipline : )