Hi, unfortunately g4 ponies are a bit difficult to price as prices can fluctuate quite a bit through out a year.
Princess Twilight & Rainbow Dash TRU exclusive $25-35
Applejack’s Barn $40-60+ (If AJ has bangs she may be more desirable)
Princess Celebration Bakery $15-30
Cheerielee’s Schoolhouse (wasn’t released in US) $60-80
Pinkie Pie & Sweetie Belle Sweets Boutique $15-25
Fun at the Fair $40+
This is currently my best guess based on eBay completed listings.
Unfortunately Fashion Styles aren’t as highly sought after so your TRU set, although exclusive, isn’t that desirable.
Prices also go high right before Xmas so when doing your pricing know that they probably won’t go as high as they did then.
It was only possible to get an AJ with bangs in her wave 1 single & this barn set, not all of the AJ’s in these sets have bangs so check to see if yours does. For a while g4 collectors were seeking out AJ with bangs so it may make her more desirable.