I keep Shetlands.... have seen them go at market last time (July) for 10 prime ewes with 15 lambs at foot for a mere £32 per head.
The posh butchery here that specialises in Shetland and Salt Marsh lamb sell them at £85 per half, delivered.
I will be selling mine (if I ever get them butchered!!!!!) at £50 per half lamb - costs £18 kill, split and rough butchered her (i.e comes in 2 large bags, not vacuum packed, cut up but need to bag up yourself) or £12 kill and split plus £20 for posh vauccum pacxking, labelling etc of you want to sell it out.
The problem with Shetlands is it costs the same for slaughtering and butchering a small breed as it is a large breed which carries more killing out weight. They also take longer to rear as they are slow growing but their meat is far superior IMHO!
The good thing about Shetland is that (dare I say it) they are pretty cheap to pick up compared to some other breeds/commercials etc, they are hardy and survive on little, and their fleece actually makes you money rather than costs yoou money as in the case of commercials! IMHO!
Now just to clarify, this is a generalisation based on my own PERSONAL experiences of keeping Shetlands, Commercials, and Shetland x commercials, just in case it offends anyone!