"AJ"
Similar to "why buy a Honda Civic and spend too much money to make it faster when you can just buy a better car?". Satisfaction, spend as you go, what you can afford for now, etc...Personalized.
If you have an inaccurate Marauder assuming its a 22, you need to try as many different types of pellets with different head sizes and if all else fails then try and use the H&N Barracuda/Barracuda Match with the available different head sizes or the H&N FTTs in 5.53 5.54 or 5.55. It is a hunting gun out of the box in its factory condition for an inch groups at 50 yards.
The Marauder has a wonderful trigger, is really quiet with its effective factory baffled shroud, no grey area with NO obvious THINGY sticking out at the end of the barrel, and can be easily user adjustable/ tuned to 2000-2500 starting psi making it less of a chore when using a hand pump to fill it. If you check out the ongoing Hunter FT and FT results nation wide, you will see Marauders taking top honors which should tell you something. Marauders would not be used by many different individuals in competition if they weren't excellent guns to begin with. I personally like the trigger and have had the opportunity to shoot a highly modified one and it was easier to shoot accurately IMO than an FX brand gun. If you need to turn it into an ultimate tack driver, the bare minimum would be minor user adjustments and buy a DIY drop in $180 upgraded LW barrel. Not needing to send it off anywhere. Lots of Youtube videos on how to.