It can become like an addiction, especially if you don't have clear goals and clear limitations.
I found for me at first I'd spend a few pounds at carboot sales. Then that would go up to a tenner each time ( I know that doesn;t sound a lot, but this was in the early 90's and a £10 would buy you loads!! Especially when i picked up a lotof the last 17 including Yak and Luke Stormtrooper, for 50p each!)
Then in the late 90's it moved to £50 a go, as I discovered collectors shops.
Then it slowly began to move to a few hundred at fairs, then eventually £1000 at each show ( which were luckily only 3-4 a year.
And then there was eBay :twisted: The easier it gets, the easier it is to spend.
I always found there was a threshold, which, once I crossed I would easily do so again. So for example The first time I paid £25 for a figure. Once I had done, I continued to do so. It became the norm. Then I crossed the £100 threshold, then the £500, then the £1000. It just keeps on going.
Until one day I crossed the £17.5K threshold!! :? I must have spend around 25k that year all in all!!
So basically what I am saying is, if you think you have a developing issue with spending so much, pull back, take a break. Assess what it is you hope to achieve and can sensibly afford to achieve. Then go slowly.
I have known collectors from years ago who nearly lost everything because of their collection. They spent so much building it up then in the end they had to sell it all. Scary!!