Mexican Medley was around the $50 mark I think
french (not italian
) Bowtie $60-80
Argie Baby Confetti ~45 perhaps
Greek Baby Bluebelle I would expect to be around $120-160?
I found this post from 2013 which could help you with her -->
Sounds like Baby Bluebelle (Greek name Elsi). $100 is a very good price for her. I'd say she's worth closer to 200 in great condition.
Since her price is so low, she may be missing a lot of hair plugs. Missing 2 to 4 is almost normal; even MIB ponies can be missing plugs. But missing 6 or more will really start to affect the value, so check her mane.