Damn... I wouldn't even pay 450 if it came with a V9990. There's been a bundle of Turbo-R's on ebay for around 150. And even then one of them didn't sell...
There were a few Sony MSX2+ computers for sale at 75 euros. I bid on one of them but lost by one euro, how classic... At the same time there was a Turbo-R (I think an ST) for 150 euros that had to go on auction twice in order to get sold. Later there was a GT for 150 euros but it was sold pretty quickly. I tend to look from time to time to amaze myself with today's prices...