Ha.
I think with the S4 it'll be a lot to do with the price really. My S4 wasn't really aggressivley advertised, just thrown on a few forums, occasionally on Gumtree, and even a couple spells on Autotrader / Ebay. But that was over the 18 months.
Over that whole time, it was the cheapest one in the country for about a year, then it settled at what I needed for it, when prices started getting seriously low.
You could be lucky, and get a call tomorrow for yours, or you could have it up for a year. If you want a quick sale, be prepared for a serious drop in money. I was lucky mine was spotted by a 21 year old with an amazing insurance quote, or else it would still be in my garage.
