Surely you can get a nice looking one for less than that though?
I hate plain when it comes to baby things. I disagree with all the threads which say just dress baby in white vests/sleepsuits for the first few weeks. BORING! But having said that there are nice highchairs which don't cost that much. And must agree with the all-plastic suggestion, or at least one with separate covers, which you can have at least 3 of, to rotate through the wash!
For the record I have the Fisher Price Rainforest booster seat. It's not plain but it might not be pretty to your taste either... I liked it I didn't like the look of the Antilop.
The Cosatto 3-sixti is the best high chair, we love it. Easy to clean, easy to get little one in and out of, tray brilliant and being able to use it with a tray or at the table without (the height is infinitely adjustable to suit most tables)is great. Harness was a little big for her to start with and not sure how it will cope when she's a lot heavier but at the moment we're VERY glad we chose it. I would recommend to anyone.