For your HL2: $1.5 Paypal OR I can buy and gift you other games on Steam/Amazon for the same price
For 1.25? Seriously.. HalfLife 2 costs 10.
$1.5, not $1.25
All the games traded on SteamTrades are usually sold for the sale-price. HL2 standalone was on sale for $2.49 5 times. Also considering that you could buy Half-Life Complete (10 games) for $10 (were on sale 5 times), the price of HL2 alone is just $1. You can still buy the Complete bundle on ebay for $8-9
Far Cry 3 Blood Dragon, Far Cry 3, Bioshock 2, Bulletstorm, Mirror's Edge, Skyrim, Hitman: absolution, bioshock infinite+season pass, Batman AA GOTY