I have a philco model 51-1732. I see it is only worth $50.00 to $60.00. How fast do you think this model may increase in value?

:I have a philco 50-1725 and it is worth about the same. Our radios may or may not inncrease in value. You'll just have to wait and see. Certain radios as they get rarer will increase, such as a philco 90(I want one of these). The philco 90 is veery hard to find, and I havn't been able to find one yet. They are worth about or at least $400. Popularity also has an effect on value. If the radio is not very desirable, value may just hold at the current value.
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:I have a philco model 51-1732. I see it is only worth $50.00 to $60.00. How fast do you think this model may increase in value?