The LimeSDR Mini is a sub $200 RX and TX capable SDR with 12-bit ADC, 10 MHz to 3.5 GHz tuning range and up to 40 MHz of live bandwidth. 

Due to supply chain difficulties sourcing the FPGA used on the LimeSDR Mini, an End of Life statement for the original LimeSDR Mini has now been released. However, the silver lining is that at the same time as this announcement Lime Microsystems have announced their plans to release the LimeSDR Mini 2.0.

Between the LimeSDR Mini 1.0 and the 2.0, there appear to be no major changes apart from the Intel Max 10 FPGA with 16k logic gates being replaced by the larger Lattice ECP5 FPGA with 44k logic gates. Lime Micro notes 

Not only is the ECP5 more readily available than the Intel MAX10 FPGA used in the previous design, but it has an extensive set of open source tools and a great community of developers.

The LimeSDR Mini 2.0 is in currently the 'coming soon' status on CrowdSupply and you can subscribe there to get updates on when it is released.