When you sell it, used is used. I wouldn't even mention that it was a refurb. It's irrelevant.
Would I lose much more resale value on a refurbished imac compared to buying new? Is it really worth it to save a few extra bucks?
Now me personally, I would not care if it was a refurb, but I do think refurb products in general have a bad reputation, and this might impact your end price.
One point to note is that you can often get brand new machines at close to refurb prices through vendors that don't charge sales tax. You might pay a few dollars more than refurb+tax, but you'd have the box and the ability to sell it as a new machine. Check out Appleinsider.com's mac pricing list for some pricing from a number of vendors.
Now me personally, I would not care if it was a refurb, but I do think refurb products in general have a bad reputation, and this might impact your end price.
Apple refurbished products don't have a bad reputation at all. Since Apple allows you to buy a product and return it if you don't like it, there will be plenty of products that might have been just unpacked and returned immediately; they cannot be sold as new but they are identical to new. Most of the iPad 3's that you can buy refurbished are probably absolutely brand new.
Following the discussion about Apple's tax avoidance, buying a computer and not paying sales tax is actually tax evasion.
It think it is about a sure bet that if you list two, identical iMacs on eBay and one is not a refurb and has the OEM white box, and the second is a refurb with the brown box, the refurb will pull a slightly lower auction ending price.
While that is possible, the concern over resale value is still asinine.
Asinine? It seems like a perfectly logical factor to weigh in a purchase decision. Right now the 21.5" iMac refurbs are $200 off new MSRP. If the OP thinks a refurb might sell for say $100 less than the new machine in a couple years, that is a valid point to consider. Maybe not important to you, but it is not asinine.
although $100 more for retail packaging 2 years out means a gullible buyer.
I spent years selling used goods for profit.
2 of the same item, one with packaging one without, the one with always could bring in more $ and typically would sell easier.
Are they suckers, sure kind of. People like things to appear close to being new as possible in presentation, and many will pay extra for that. Especially if the item is being considered as a "gift" of some sort. i.e. my earlier comment regarding holidays.
At the start of the thread, it would not have been assumed that the OP would keep retail packaging. Now that it has been mentioned, it's probably safe to assume so. In either case it's used. There's no need to disclose that it was purchased refurbished. I would personally disclose if I knew something was wrong with it. If someone asked if it was from the refurbished store, I would tell them. The way the OP is written suggests that the refurbished store carries units that are somehow tainted. The forum tends to hyper-analyze things such as backlight bleed, image persistence, and variation in color temperature relative to other devices. No one has ever brought up complaints with the quality of refurbished vs. new.
What you haven't mentioned is how much of a difference retail packaging made in any given situation. Refurbished imacs of the current generation are $200-300 lower than new assuming you're just looking at the Apple Store and not at the student discount rates. Were you really able to eclipse those amounts simply due to retail packaging? I have no idea how much more. I assume it was significant enough to mention it in the first place, although I do think they were suckers.