is it worth to sell?

i have 2 trucks but i am the only one working
2013 cascadia with 12.7 preemission detroit that was installed by mechanic and has probably arount 300k on it since rebuild/install , 13 speed , new water pump , performance turbo , ecu tuned by leon , manifold.
decent brakes and tires , suspension is good , alligned , overall good working horse
2009 kw t660 with 7cz , 13 speed , tuned , stage 2 or 3 turbo , Kurt tuned it , matching michelins all over with probably half life , aligned , new divider , new clutch , upgraded turbo , new tanks , half fenders , rear tail panel , visor , steer air ride , new brakes , chambers , shocks , APU , new side boxes , new batteries , 430k on c16 with paperwork
just trying to figure out which one to sell and how much realistically i can get , i am thinking to keep one of them and since diesel is 5 bucks per gallon - probably keep cascadia since it does 7mpg all day long , but kw last 3 months did between 6.25 to 6.85 hand calculated and so much fun to drive with all that power.
kw been painted around 2020 both trucks been driven by me 80% of the time and maintained with one shop whole time except engine work (same shop did engine swaps for both)
i thought about keeping both trucks in case one gets broken , but one is just sitting still and driven once a month just to keep everything in order