finding out info on a name of bud?

1st off i would like to say hi to this site as im new and this is my 1st post. so this is the deal i got this bud called "blackstar" but when i go on google it takes me to a site and shows a pic of this http://cannacentral.com/strains/blackstar/ & the bud i got looks nothing like that pic. the bud i got looks like dark pueple haze so dark it looks black & looks just like this http://www.youtube.com/watch?v=Awsu4G4vghE so can any one tell me what this bud is? because i know for a fact its not "blackstar" also i got it for $150 half an O & he would sell me a hole O for $300, so do you think the prices he be giving it to me for is good or bad for what ever bud this is? also if i get it at thous prices and i were to serve it is that good or bad? also a little extra info were i am located is in miami florida i am saying this so you can tell me based on were im at is it good or bad prices.