Easy, easy, let's break down the price structure for you step by step.
$89 is MSRP, $101 is price on your Invoice, including VAT, that's a hard request. Since Taobao is a business based in Great China and mostly serve for people living there , we need to complying with local government regulations. If you are sophisticated enough to dealing with the car dealer, it's just the similar quotation experience.
For $130 on eBay, that's the price for whole Dev bundle customized for international buyers, including the following:
1. Bubblegum96 board - $89
2. Power supply - 10$
3. Debug Kit, TTL2USB+PCB Adapter(uCRobotics manufactured in small batch, not cheap) - 20$
4. Acrylic/3D Printed Case - $10
We are so sorry to make you confusing and thanks for raise your concerns about those price looks like inflation but they are actually very reasonable.
Anyway, we've update the the above information into latest eBay page, http://www.ebay.com/itm/262879152597