I get through a bit more than 25kg of Peanuts through Winter, so buying it in a cost effective way is quite essential.
I get mine from GJW Titmuss and ordered a 25kg bag on Sunday night > free delivery and it arrived Tuesday morning (you can give special instructions if you're going to be out and track the order through Yodel).
The cost was £29.99.
Having a look round local shops I found the cheapest was £2.50 for 1kg - pro-rata, for 25kg buying it this way would be £62.50 !!
So if you're forever buying small bags of Nuts for your birds - this may be of help.
You can see the Peanuts and full range of Wild Bird plus other Pet products from Titmuss by clicking the banner immediately below this post (and yes, I get a wee bit of commission )
Richard