Unless you need the space or cash I would keep them for color. I made the mistake of selling of some vintage compressors last year. I went back to eBay and Sweetwater and purchased the same ones again with some additional new 2-bus compressors. Analog compressors just seem to push through a mix IMO. I tried the "ALL ITB" but just couldn't get my mixes were I wanted it with the digital compression. I made mix comparisons to my older analog mixes and my ITB compression didn't measure up. Maybe me though.