It’s either a bug or they changed it.
That’s a t-shirt: the price floor is 2 R$ or 20 tix. Been this way since October.
http://blog.roblox.com/2013/10/lower-floor-prices-for-clothing/
[quote]
The new floor prices are 10 ROBUX/100 tickets for shirts and pants, and 2 ROBUX/20 tickets for t-shirts.[/quote]