Combination of the past two suggestions.

http://backpack.tf/vote/id/514fdf9fba25363503000015

http://backpack.tf/vote/id/5150f2504bd7b8df52000024

Credit to Duscoda:

http://www.tf2outpost.com/trade/9270969 Offered 2.75 keys

http://www.tf2outpost.com/trade/9393937 Sold it for 3 keys.

http://www.tf2outpost.com/trade/9378162 Traded for a Gold RL worth 5 keys. Gave atleast 1 key.

http://www.tf2outpost.com/trade/9475079 Sold for 3 keys.

http://www.tf2outpost.com/trade/9174968 A little old but had a buyer at 3 and at 3-3.5 keys.

http://www.tf2outpost.com/trade/9504433 Sold for 3 keys to a guy named Meaty.

http://www.tf2outpost.com/trade/9248833 Sold for a Festive RL (worth 3 keys).

http://www.tf2outpost.com/trade/9434511 Offered a Vintage Tyrants (2-3 keys).

http://www.tf2outpost.com/trade/9229422 Sold for 3 keys.

http://www.tf2outpost.com/trade/9532220 Offered 2.8 keys

http://www.tf2outpost.com/trade/9278512 Offered 1 key + 9 ref (3.22 keys at time of offer).

http://www.tf2outpost.com/trade/9478290 Bought one and a key with a Strange Widowmaker (4.5-5 keys at time of trade).

http://www.tf2outpost.com/trade/9420763 Offered 3 keys in metal.

http://www.tf2outpost.com/trade/9452507 Sold one for 3 keys.

/credit

Credit to Ruff:

Filosofem [F.£.A.R] and Aslandier on the classifieds have sold their G. Original for 3 keys each

/credit

http://www.tf2outpost.com/trade/9543816 Selling for 2.5 keys (Underbumped, unsold)

http://www.tf2outpost.com/trade/9523283 Selling for 2.5 keys (Underbumped, unsold)

http://www.tf2outpost.com/trade/9484063 Selling for 2.5 keys

http://www.tf2outpost.com/trade/9550222 Selling for 2.5 keys

http://www.tf2outpost.com/trade/9525699 Traded their F. RL for a Gen. Original

http://www.tf2outpost.com/trade/9464049 Sold for F. RL (3 key value)

http://www.tf2outpost.com/trade/9521777 Sold for 3 keys

http://www.tf2outpost.com/trade/9528436 Had an offer of ~2.5 keys (Owner closed trade, didn't sell)

http://www.tf2outpost.com/trade/9377200 Quickbuyer willing to pay 2.5 keys per original, has plenty of keys + metal

http://prntscr.com/xrca2 Sold mine for over 3 keys in items ~2 days ago

http://www.tf2outpost.com/trade/9577591 Selling for 2.75 keys (Unsold for 2 days, check their previous trade)

Santa Heavy showed 13 different quick buyer trades for 2 keys each, and 0 of them have been successful in the past 2 weeks minimum, which is why 2 keys was removed from the range.

I know the market is pretty saturated with people selling G. Originals for 3 keys each. That bundled with people selling at 2.5 and getting offers below 3 keys does show that it needs a bit of a bump down, but there are still many successful people selling theirs for 3 keys which makes 2-2.5 a bad range.