In a market that is gaining, fringes are fine...in a market tthat is stagnant or in decline you want to be careful, if you plan to live there quite a while you should be OK.
I began in the depths of the market in 1991, I saw a number of buildings that had just been built or redeveloped on the fringes...they were like islands in the desert. You coul end up in a coop or condo that gets in serious financial trouble if owners cannot sell or rent and have to dump their units or be foreclosed upon. Even if the Coop/condo can ultimately get the money from a sale they may have to cover nonpaying owners in the interim. You can see assessments to cover ongoing expenses. (Bank gets its money first remember--and they only care about getting theirs as fast as possible)
BTW I lived on Ave A and East 10th back in 1991, Great Townhouse on the Park...a very "Rent Musical" time, yes I even frequented the Life Cafe! When it was not scary it was fun, but it was more scary than fun. I would be wary of Ave C & D. But I am older now!... more