Hear me out before the pitchforks come out please 
My older boy loves Star Wars and now the figures, it started off with LEGO but I've given him a couple of dozen vintage figures over the last year which he loves. But they were all rough spares with no accessories (partly because they were small and I was worried he would eat them.)
But now he's 4 and a half, he saw my complete figures and really wanted the blasters for some of his figures. There's no way I'm giving him £25+ accessories to play with (lose) and he wouldn't accept my suggestion of using some of the many LEGO blasters we already have!
So today I have just bought him a handful of repro blasters from eBay. Although I bought the grey plastic ones so they should never be confused with the real things, I still feel bad about it. But you get to a point in life where pleasing your son becomes more important than keeping the collecting community happy, I guess.
So what have you all done in similar situations - thrown caution to the wind and given your four year old £200 worth of 1cm plastic things? Stood your ground and said no?!

My older boy loves Star Wars and now the figures, it started off with LEGO but I've given him a couple of dozen vintage figures over the last year which he loves. But they were all rough spares with no accessories (partly because they were small and I was worried he would eat them.)
But now he's 4 and a half, he saw my complete figures and really wanted the blasters for some of his figures. There's no way I'm giving him £25+ accessories to play with (lose) and he wouldn't accept my suggestion of using some of the many LEGO blasters we already have!
So today I have just bought him a handful of repro blasters from eBay. Although I bought the grey plastic ones so they should never be confused with the real things, I still feel bad about it. But you get to a point in life where pleasing your son becomes more important than keeping the collecting community happy, I guess.
So what have you all done in similar situations - thrown caution to the wind and given your four year old £200 worth of 1cm plastic things? Stood your ground and said no?!