Seems expensive to me. I bought some 3-4" WC at Mainly Cichlids for $15 about 1 year ago.
Uropthalmas = dot close to the tail is at the midpoint of the base of the tail
Festae = dot close to tail is ABOVE the midpoint of the base of the tail
Pics above by VRWC show this as well.
Cost is subjective...If you want Festae bad enough $50 isn't going to change your life (unless that is your food allowance for the week or something). Just make sure you are getting a festae.