Ok... I'm going to seem kinda OTT over this, but I having been keeping track of this girl on ebay since scoring her a while ago for a pretty good deal, and here are my notes.
Please note I recorded the value in NZ dollars though. Averaging her out in US dollars however, she works out at about $393US for the pony alone.
Ebay Listing # 121405638839 19/08/2014 $607
Ebay Listing # 111496761094 2/11/2014 $493.50
Ebay Listing # 161484114289 15/11/2014 $506.59
Ebay Listing # 371343108147 10/06/2015 $605
Ebay Listing # 181768681119 14/06/2015 In a lot that sold for $657.55NZ
Ebay Listing # 171877097575 3/08/2015 $586.85
Ebay Listing # 321946214084 18/12/2015 $524.76
Ebay Listing # 191797954715 2/02/2016 $591.28 dollar rate high at the time
Ebay Listing # 322149630957 18/6/16 $458.81
Ebay Listing # 272289791602 5/7/16 $568.18
Ebay Listing # 182159948704 12/6/16 $795.45 sold with charm incl
Ebay Listing # 162168569100 18/8/16 $483.00