Not sure if that's what you meant, but in general, I have no expectation that any consumer electronics, used regularly, will last more than 5 years. Technological changes and 'planned obsolescence' have not been taken into account. My main criteria for 'value for money' in consumer electronics is 1 year of regular service for each $50 in price. The other criteria I use is how much to pay for an item if there is a wide selection of said item with different prices. Number and type of features not factored in. Am I better off paying $10k for a radio, and being tied up to it, due to financial constraints, for 10 years? Or am I better off buying a $1k radio, and being free to upgrade more frequently? I have not tried this with radios, but I did and still do with computers. Those that need horse power now, have no choice, but for normal home use, staying in the low end and upgrading more frequently has given me better 'returns'. I did not take environmental concerns into account. That's another kettle of fish.