I wouldn’t touch it with a 10 ft pole. I would not be surprised to see this or similarly old units drop to $200k or less. Rent and save your money.
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I’m exaggerating a bit here. Cortez Hill is a good area of Downtown (better than East Village, IMO) so compared to other properties at 1000sf, this one is not bad. But, realistically, you should wait another few years. I bet that you’ll be pleasantly surprised at what you could afford in a couple of years. Renting is the best option for now.