With all such questions, of course, it depends. It depends on if you are looking for a two horned or multihorned tup, if you are looking for a show winner or just a good sturdy sire for your meat lambs, it depends on if you are looking for a registered breeding animal or not, who you are buying from and whether you are at a rare breeds sale or going private. The cost of a tup also varies with the year, in that supply and demand fluctuate. It also depends on how much you are prepared to pay.
The highest paid for a Heb tup at a rare breed sale that I am aware of was just short of £1,000, but I think that was something to do with raising the profile of the breed ie perhaps pre-arranged, cynic that I am.
A good, run of the mill but registered tup would be somewhere over £100 and for a show tup you might pay several hundred, perhaps for the breeder's name. Hebs never attract the sky-high prices you see at pedigree ram sales
Sorry I can't help with the price of in-lamb ewes as I have not sold or bought them, and would not.