What condition is it in...........
It all depends on the model and condition of the rifle.
Milbro ( Millard Brothers) started making air rifles in 1949 in Motherwell, Lanarkshire. Scotland. Using machinery taken from Dianawerk in Germany after WWII. Milbro was sold in 1970. Unfortunately I have no information on the model 605. Milbro continued to make air rifles under the Diana name, but I can't find anything in Diana relating to model 605.
where can I purchase an owners manual for a Milbro G10 Air Pistol
The 230 was made in Scotland by Milbro from 1965-74
The best way to have this rifle repaired is to do a wed search for "Air Gun repair" and locate someone near you to have it repaired. There are several people/locations around the world who repair airguns for a living. I've sent out several from my collection to shops in California and had them restored or repaired. a model 250 ( Milbro) at best is worth $130. At least is worth $25 so you have to weigh the value of the rifle verses the cost of repair.
25-100 or so
What condition is it in? That determines the value.
This model was made between 1965-70. It was made for Daisy by Milbro in Scotland. It worth somewhere around $50 + or - $10 depending on the condition. After WWII Dianawerk of Germany ( they made air guns before the war.) Sold off all there machinery to England Who sold the machinery to the Miller brothers, Milbro, in Scotland who made air rifles for various other airgun manufactures.
Benjamin made a model 1300 air pistol not a air rifle. It would be worth between $130-$155 in VG shape They were made between 1959-1964 They did make a 3100 air rifle... If you have a 1300 rifle then I do not know the value.....
What condition is it in, that determines the value.
20-60 USD or so
please state the model number and the condition of the rifle. Is this a 22 rim-fire or air rifle?