I tried the ebay baroque bow and they are absolutely awful. Be careful; these do NOT function like their professionally made counterparts.
It’s better to spend the money right from the start at a reputable dealer/maker rather then throw your money away on a cheep bow and find out that it needs to be replaced.
I own a professionally made baroque bow, and I’ve also seen several professionally made Baroque bass bows (both underhand and overhand). These are very differently constructed and balanced .
Good luck on your search.
My I suggest bows by Max Kasper; email@example.com
They are very well made at a good value.