$1300.00 is a really goodrice for the head gasket and radiator repaired. You have to evaluate how long you want to keep the car. Hondas are very reliable and Ihave seen many get too 200,000 miles.
However, you have a head and radiator leak which says that the car either overheated and/or did not have the anti-freeze changed when it was supposed to. So, I don't know if you owned it since it was new but if fluids don't get changed like anti-freeze, transmission, oil regularly, brake fluid at 100,000 and power steering at 100,000 both flush and fill as well as anti-freeze is flush and fill around every 60,000 but it can be tested as it gets old and can go bad.
A vehicle that has not been maintained is usually a trouble pit. If one thing was neglected, that means others were too. It is not enough just to change the oil every 3000 miles, other fluids are just as important. It is very true that, "A hundred dollars in maintenance will save a thousand in repairs". Not only that but the car in general will be capable of 200,000 miles pretty easily if it is not driven hard and is maintained properly.
If it has not been or you are not sure of its' history, I would consider selling it as the used Honda market is always good. But, you would have to fix it first so check autotrader. Com as they have a tool to appraise your used car to others like it sold in your area. If fixing it costs near or above the price you can get for it, you might trade it in to get something out of it.