John, do they have a leather or synthetic leather "strap" stitched on the outer edge length ways? If so I would take them off before cleaning as of course you are going to clean both sides.
You can then stitch them back on or in all of my cases I leave them off.
Anyway, these rugs are perfect to saturate or immerse so by all means clean them this way. It will be a good experience for you as you shouldnt have any problems at all.
As for value, it depends on too many things. If none of the "things" are attributed to these textiles then they arent worth anything, save what you can get for them.
Best, Dave.
P.S. Sometimes these rugs have silk in them but dont worry as silk wet cleans the same as the wool.
P.P.S. Just saw Pauls post, dont be scared, soak the thing.
Wool and silk both wet clean very well, if you use an injection type cleaning you run the risk of fibre damage to the silk yarns.
Again, these are ideal for your first, if it is your first, saturation clean