Can 'O Worms: how long can I expect my 5er to last?

To quote Oscar Wilde, "to know the price of everything and the value of nothing". To be so materialistic that one is unable to gauge or recognize something's true value.

For us, we don't care how old our unit is as long as it is in good shape and provides value for us. It's paid for, we can fix almost anything on it ourselves. By the time we have to sell it, it won't matter what we get out of it because the return on investment already has outweighed the initial investment.