Are you asking for the price of unregistered store lambs? If so that would depend on weight etc, we have been selling ours for about £70 ea for people wanting them as stores. We sold purebred lambs at market this morning for £95 each. Obviously registered good quality pedigree breeding stock is going to sell for more.
Sold as butchered freezer ready lamb we sell some of ours directly for £70/half lamb, collected locally to regular customers or £75/half delivered. This is usually for 11kg + weight of lamb.
£90 for a whole boxed lamb seems very good value, it costs us £28 for slaughter and butchery for one lamb, are you sure it isn't for half a lamb? You have to consider the price per kilo
It is delicious meat, and leaner than most so hope you enjoy it!