Hi Stanwal
Yes i had Musical fidelity M-250 monoblocks around 4 years ago
i have always found M/F to be a very good piece of kit , they remind me of a up market Rotel in the context of balanced design ( Quality sound , well designed ) . To be honest i have not been in the game of judging a product based on its re-sale value for which i see a lot of the sledging directed at M/F
I only sold the M-250's as i moved to another state and had to down size a lot of my kit. Prior to to that i had a M/F A3cr pre-power 120wpc set , again great sound and lovely
build.