Stamp value

One for my Stateside readers here: Can anyone tell me what the value of one of these is?

(The explanation, for those who are interested: Back in the day when I was submitting lots of stories to US magazines, I built up a stockpile of US stamps for editors to send stamped addressed envelopes to myself in the UK. The stamps were 80¢ ones; because I anticipated this to rise, I got a number of H-rate markup stamps too. According to the Net of a Thousand Lies, the postage seems now to be 98¢, which is annoying, as I have enough H-rate markup stamps plus one 10¢ stamp to make up 97¢;^* so, I'm wondering if I might be able to do something useful with the above stamp instead.

* Even more annoying, I've just discovered the eight franked International Reply Coupons I got for SAEs to be posted from other countries became useless at the end of 2006. That's £12.80 (in today's money) down the drain.