I know many of you are not looking to buy looms now, but I will start this post for your reference if/when you get to that point.
Table looms have 2 key aspects:
1) The number of shafts
2) The weaving width
Increasing either of these, will increase the price/value of the loom. i have listed the manufacturers of the looms we used on the course that are still in production. There are links to one source of each loom as well, but you can buy most of these looms from a variety of soures in the UK.
Ashford- Sue's loom that held the straight draw warp is an Ashford loom. They do 2 models of table looms. I personally like them both, but some people like one model or the other.
Le Clerc- The loom with the red herringbone warp was a Le Clerc, it comes in a variety of weaving widths. The loom on the course is their smallest weaving width. This loom can be folded and this width will fit in a carry on bag. Le Clerc is a Canadian manufacturere, but their equipment is readily available in the UK.
Louet- The rosepath and the summer and winter warps were both on Louet looms. The Louet table loom has changed a bit recently, in my opinion most of the changes they have made are for the better.
Schacht- The taquete/tapestry warp was on a Schacht loom. The one used in the class was built in the 70's a Scacht loom will truly last. New Scacht looms have an improved lever mechanism, so please don't judge the looms they make now based on the 40 year old loom you used in the class. (I just realized that loom and I could very well be the same age!)
The above links are for reference if you ever decide to buy a used or new loom. Before you buy a used loom, I recommend you price compare with buying brand new. Keep in mind if you buy brand new, you are guaranteed dealer support, though most dealers will provide you help with a used loom if anything comes broken or damaged, you will have to purchase replacement parts. New looms will also have to be assembled before you can weave on them. If you buy a used loom and something seems not quite right, it is entirely possible that the original owner did not assemble it correctly. Most loom manuals can now be found online. If your used loom does not come with the manual you are not out of luck!