Don't underprice your product, but only offer for sale the best fleece. Offering bad and dirty fleece will lose you custom and give you a bad reputation.
Most of your breeds are not typical craft work fleece producers, so don't expect many of those to sell. Some will sell to someone with a specific project in mind, so do put them out there. For the Shetlands the opposite is true - they are very popular but also the market could well be flooded as they are a popular breed and most breeders will be trying to sell to spinners, felters and so on, so yours need to be special.
Before you think of offering fleece for sale, have a good look at each one, unrolled. I have written somewhere in TAS a blow by blow method for assessing a fleece for selling to crafters. Sorry but I don't know how to find that, although I think Sally stashed it somewhere so folk could find it again.
It's well worth taking the trouble to check over your fleece so you can present it well.
I know nothing about llama fibre, but it could be hairy - not beloved by spinners, as the hair has to be removed. So selling those will depend totally on the quality. Plenty of people offer alpaca fibre for sale, but I don't think llama fibre is so available so might be something spinners would try on the offchance if it wasn't too expensive.
Pricewise for sheep fleece, start low at the prices Ladygrey suggests, then if you sell successfully the first year, up your price next clip.
I wouldn't offer for sale a fleece which I thought was worth less than £5, but £5 is what fleece was selling for back in the 1970s. It's a fact that spinners and craft workers are not prepared to spend much on their raw material, in spite of the fact that it is something they will be working on for weeks if not months. I don't really get this, but there you go.
My run of the mill fleeces from Hebrideans and Shetlands I would sell for about £8-10, and good ones for £10-15. I used to breed specialist fleece sheep until about 8 years ago and would get up to £20 per fleece for those. I know of a top fleece producer who asks, and gets, £40 for top fleeces (that was several years ago so may have gone up since then)
I don't sell my fleece by the pound or kilo, as my primitive fleeces are fairly small, and vary in quality over the fleece, so if you were to take a kilo from one part it would be of a very different quality to other bits. My fleece specials were much more consistent and also huge, so I offered those in halves (split along the backbone) for £10 per half.