Hi Mischief,
I think that its subjective to what you want to do. I still buy the cheapies that I like and occasionally I will push the boat out to obtain a wants list item;
Kurt Harris, Cookie Jackson, Ray Pollard etc.
Thing is though there will always be the ellusive records and its up to each individual to pay what they feel is right. So although limits, I suppose, do grow with the obession - some folk will always have that little bit wider tolerance of hefty price tags or the lack of worry about paying them as they have to have a certain track. ( do we know any one like that )
In some ways as well it depends on if you are a record keeper or you buy them hug them and sell them on.
I like to keep records and wont get castrated so don't have enough sheckles to get all my pricey wants at the moment. Who'd have kids.