The 1/43 1M is going for crazy prices at the current time. The latest I seen was at euro 799. There is no way to get them for under euro 100.
However the company that made them for BMW before they went insolvent have been acquired by another company along with the rights of the 1/18 BMW X3 and BMW 5er Gran Turismo and 1/43 BMW M3 GTS.
They have since introduced the 1/18 X3 and 5er Gran Turismo , It is hoped the 1/43 1M is coming too.
A Chinese company that specializes in diescast 1/18. Has expressed a desire to manufacture A 1/18 model of the 1M in its three colors...
Although someone with exceptional modelling skills was too impatient to wait for one.