Hi Dans
So glad you got the bug, I keep thinking there must be safety in numbers...
Your basic requirement starter pack is a wheel and three bobbins, nice to have is a Lazy Kate (but they're easily mocked up) and a niddy-noddy (ditto.) You will probably want hand carders and other bits and bobs in due course, but you can buy prepared fibre so that's not essential.
Did you decide whether you favoured a saxony (wheel to the side of the flyer and bobbin) or a castle-style (flyer and bobbin above the wheel)? Do you know whether you are likely to want to transport your wheel a lot, or only use it at home? Is floorspace an issue at home?
Several of us on here are members of our local Guild (of Weavers, Spinners and Dyers); my local one has wheels it can loan out to new members while they learn and decide what wheel they want to buy for themselves. Note that if you have a nice local Guild, you are likely to want to transport your wheel more, to take it to Guild meetings etc! You may find a secondhand wheel through your local Guild too.
Are you thinking of buying a brand new wheel or a secondhand one?
If new, forestfibres on eBay seem to supply most brands of wheel at sensible prices
http://stores.ebay.co.uk/ForestFibres/Wheels-/_i.html?_fsub=716629014&_sid=89371294&_trksid=p4634.c0.m322, and deliver free (though do check it's still free to Scotland.) Wingham Wools
http://www.winghamwoolwork.co.uk/eqp_spinning.php are also worth a look - they do Ashford and Kromski. P & M Woolcraft
http://www.pmwoolcraft.co.uk/html/browse.php?CatID=5 do Louet wheels too, also their own make and Majacraft.
Others will no doubt come along and suggest their favourite online vendor.
Secondhand, Ashford Traditional and Travellers come up on eBay very regularly. Here's a nice Traveller on eBay near you right now:
http://www.ebay.co.uk/itm/Ashford-Spinning-Wheel-/320941266484?pt=UK_Crafts_OtherCrafts_Spinning_Weaving&hash=item4ab9971634and the seller is also selling several accessories that would be useful too.
Wheels do get advertised on preloved, too.
You can also keep an eye on Loom Exchange
http://www.theloomexchange.co.uk/spinning-equipment/and, better, ask on ravelry
http://www.ravelry.com/discuss/uk-spinners/1295775/I'd advise you to get a wheel from a spinner or a store, or find a spinning friend to take along with you, if buying secondhand. They'll know what to look at to see if the wheel's okay or not.
I enjoyed finding my own wheel so much, I haven't stopped buying them up! I snap up all the reasonably priced ones that come up on eBay in my area, get them running well and then sell them on. I get a kick out of getting them spinning nicely and then finding them a nice working home. At the moment I've only bought Ashford Traditionals, as I am very confident that I understand them and can do any jobs that are needed (or find people to help me if it's a new one to me) but it's only a matter of time before I get a Louet S15 or something else. Those Haldane's look intriguing...
Dang, I just typed all that and Juliet's Aunt's Traddy is still available.
Let us know if you're still looking after your visit to Wester Gladstone