Back in the 70s a better quality Monogram kit of say the P-39 woiuld cost aboiut 7.00. Back then I would have to think about if I could afford it. The P-61, when it showed up was abouit 12-15.00. That I would have to put on layaway or wait until I could collect enough money. Kits these days are incredably more expensive. I picked up a 1/48th F-106B after giving it osme thought. My squadron flew them, this was the only kit available, and I just happened to find it on sale. If it wasn't for those factors plus it was very close to payday and there was a little extra money available, I would have let it pass. Now I need to find a gun pod and/or a coffin pod.
Most of my kits are older, maybe 10 years or more. Unless everything comes together, the only thing I might buy would be a decal sheet or some detail parts.
If you look at the end of kits from Japan sometimes they show the price in yen, somwtimes they cover it up. I noticed that someone would take the yen price, say 2500 yen and add a dot, making it 25.00. Quite a markup.Youi just have to see what the price is and decide if it's worth it.