I would say that is a bit on the low side. If you get one from AmigaKit (refurbished, not new) the IDE split/fix (even a cheap one) you are looking at about $200 USD. Any accelorator goes for between 300-350 these days. ...... By the end of the year, I will have spent Close to a grand if not more on mine.And that JUST my 1200.
I am on eBay a lot (US mainly - but I poke my nose into the UK, German, etc. too) This is quite high for what's been selling this past year. As always, a fair price is what the market will bear. Obviously some one thinks this is worth the money.
