Wait a minute, lets clear up one thing first and foremost, these are the ways HL2 is distributed:
HL2 Retail Standard:
HL2+HL2DM(via Update)+CS:S
HL2 Collector's Edition:
Collector's box+HL2+HL2DM(via Update)+CS:S+DoD:S(via Update)+HL:S+Prima Strategy Guide Sampler
HL2 Steam Bronze:
HL2+HL2DM+CS:S
HL2 Steam Silver:
HL2+HL2DM+CS:S+HL:S+DoD:S+Valve's back catalog (HL, CS, CS:CZ, CS

S, DoD, TFC, HLDM, Ricochet, OF)
HL2 Steam Gold:
HL2+HL2DM+CS:S+HL:S+DoD:S+Valve's back catalog (HL, CS, CS:CZ, CS

S, DoD, TFC, HLDM, Ricochet, OF)+Posters+Prima Strategy Guide (full)+Hardhat+Collector's Box+Postcards
This last ultra cool package is $84.95 now, which is ~ 3800 INR. All Bronze/Silver/Gold packages can only be ordered via Steam, which means that you will not get the discs at all. So, if even they wanted to, MI cannot distribute the Bronze/Silver/Gold editions. This all has its origins with Valve having a major row with Vivendi Universal Games over them owing money, with VUG wanting money from Valve's Steam Program. So, Valve decided to lower the costs for the end user and throw in a few goodies if you purchased the packs via Steam.
So, you see, Milestone has only the Standard Retail package (which you can see in your confirmation print when you complete the registration of your game on Steam).
*img111.exs.cx/img111/953/steam0dw.th.jpg
So, I dont know the dude was selling off HL2 Gold on Bazaar, unless he meant the Collector's Edition or he was selling off his Steam account itself, which would contain all the games.
@raj: Well, if you want the original, I have a friend coming over from the US in another week, so I could get that for you. No problem!