What I do is I have a box with some few knives, the users and two or three that I'm in love at the moment, when I get tired I put them apart and bring others to the box so they seem new every 3 months or so.
Keeping budget low and fooling myself a little
Mateo
Good idea. I have a carry case that I "put away" my knives for weeks/months at a time. If I find I've lost interest in something, I hide it from myself for a while.
I've sold off too many knives that I regret losing. I now try to keep everything I receive. That means I have to do extensive research ahead of time, and visit stores or shows to handle anything I may want. I do give myself a "honeymoon" period that I allow a knife to grow on me, or not. If it's not a match, I put it up for trade or sale. Haven't had to do that for a while, though. If it makes it past that time period, I tell myself I will not get rid of it.
I do like the idea of lending it out. It's risky, but you can check out the passaround forum here. Folks often send around their personal knives. Anyone who signs up has to meet certain criteria, and you can put any additional stipulations you want on the deal. You may just want to check it out for your self, as many great knives go around that group, and it's helped me make decisions in the past.
If you can find someone to do a temporary trade, that's cool, as well. I have a friend who I used to do that with, but we see each other so seldom, it's not feasible.
Anyway, don't give or trade away the knives you have and love. You will ALWAYS regret it. I don't have much money for knives, but make due by putting a small portion of every pay-check aside in a savings account, just for knives. It's not much, but it adds up, to the tune of about $500/year. That's about 2 Starbuck's coffees per week, or 2 Value Meals at McD's, or whatever it is that you have to give up. Save up longer for more pricey knives, or splurge quickly on a good deal in the trade forums. I know I'm most excited when I finally have a good amount added up, and I spend time deal searching for just the right item.
Good luck!