Imac 22 inch 11.2

As these are international forums and we don't know where you are, it is hard to say what a fair value is. In the US where Apple products are easily available, they are cheaper than in a country that has no Apple presence.

That said, I would avoid any iMac that old (an iMac 11,2 is a Mid-2010 21.5-inch iMac). The entry level processor was an dual-core i3 that is very challenged in today's environment; even the optional i5 was only dual-core. By the next year, the entry level processor was a very nice quad-core i5 that was much better than the i3. Note the massive difference in GeekBench performance scores between the 2010 and 2011 21.5-inch iMacs:

[scores found in the MacTracker database, available in the Mac App store here: Mactracker on the Mac App Store ]

The other issue is that, if history repeats itself, the 2010 iMacs could be losing the ability to update to the latest MacOS with the next major version. Frankly I would not look at anything older than about 2015 if you plan to keep the computer longer than 12 to 18 months.

As used pricing even varies in the US by area, your best way to get an idea of fair market values is to look to Craigslist ot eBay listing for sellers in your area.

As you are in the US, consider looking at the refurb Macs Apple sells directly online. All our workhorse Macs and iPads were bought as Apple-direct refurbs and very one has given flawless service. I saved $500 on my 27-inch quad-core i7 I bought in late 2011--it is still my go-to desktop. You basically get a new computer; none of ours showed any cosmetic defects. Plus you get the full one-year free warranty, and refurbs are eligible for AppleCare. Just like new.

As these units come and go, the offerings change quickly. When I bought my MacBook Pro I had a particular model in mind. I was ready to buy but none were listed on the site with the specs I wanted. Two hours later it was there and I ordered.

iMac things to note:

1) With the exception of the 27-inch models, iMacs are not user-serviceable. If you go with the 21.5-inch model, get more RAM than you need, at least 16MB, because you can't increase it later.

2) Consider an SSD drive or, if you need a lot of storage, the Fusion drive option. The standard 1GB rotational drive is a bit slow. Big SSDs add a lot of cost.

I bought my daughter a new iMac last fall and chose the 2017 21.5-inch Retina because that upped the base processor to a very nice 3.0Ghz i5 quad and provided "discreet" rather than integrated graphics with a lot video RAM which she may need in the future. We also ordered it with 16GB RAM. Hers was new and "built to order"or "BTO." Refurbs cannot be changed from the specs shown on the web site.

Anyway, check this Apple site several times a day when you are ready to buy:

Refurbished Mac - Apple