That sounds about right... 1 guinea is £1.05 I think.
Once upon a time "a guinea was considered a more gentlemanly amount than £1. You paid tradesmen, such as a carpenter, in pounds but gentlemen, such as an artist, in guineas". I guess that tradition has just stuck.
Found this on a horse racing site
"Thoroughbreds are sold at public auction in Guineas (gns), one guinea equals £1.05. Traditionally horses were sold in this currency and the five pence from every guinea was taken by the Auctioneer as commission."
I bet they get more commission than that these days...
Yip iv just bought 3 sheep in guineas - instead of a £1 its £1.05.
The auctioneers usually keep the extra 0.05p. However the seller also pays a commission on the sale too!