The best place to buy vegetable seeds?
I don't know of any place for seeds in Manhattan or Brooklyn havng left the area 33 yeas ago but i can give you names of some very nice seed companies that you might want to try especially if you are looking for heirloom and interesting seeds.
www.totallytomato.com has heriloom seeds
www.sandehillpreservation.com also has heirloom seeds
www.pandpseed.com has giant seeds
www.heirloomseeds.com has many heirloom seeds
www.rareseeds.com is another one
www.containerseeds.com specialize in seeds for container gardening
www.thehippyseedcompany.com sell what we call ultra hot pepper seeds such as the
Trinidad Scorpion Butch T which is considered the hottest pepper on earth
www.growitalian.com specializes in seeds from Italy
Hope this helps you out