I'd LOVE this. A 60 day time sounds good to me. I hate seeing those 1000+ day old trades of old items that there's no point in offering on.
On this subject though, I'm SO looking forward to trades being revamped. It's ridiculously difficult to send items around on this site and there's no reason for that.
-Up to 10 different items per trade, unlimited # of each item in that trade
-The main trade page shows your trade "notes"/whatever you type in the trade
-"Item trade" turned into "Closed Trade" and you can request up to 10 different items (unlimited # of each) AND IcePoints OR IceCash.
-Creating a trade is easier, item names and quantity are listed, ordered alphabetically (it's currently ordered by when you got the item --weird)
-You can leave notes when you offer like when you make the trade
-Trades are no longer on a like 5min waiting time, they automatically get accepted and the items get sent out. This confuses newbies!
-Easier to navigate pages (no drop down menu pls, it looks so bad), possibly a "Show 25 Per Page, Show 50 Per Page, Show 100 Per Page" type system as well.
-Mail icon on trades for easy contacting
-For fun, maybe if you're on the trades page, you can get a little notification when there are new trades up? It could just say "There are new trades!"
I wonder what other ideas people could have to make trades more fun and easy to use.