My husband is interested in investing in an Ultrasound for our snakes, since he would like to keep track of follicle progression and we are not experienced enough to gauge them accurately by feel, except to go "yep there's something going on in there!"

There are two machines he is looking at - one is portable, the other is stationary. Has anyone used these machines, or similar ones? IYO are they worth it? Would either of these be a good fit for our needs, or can you recommend another brand/variety?

Thanks!