Moscow appears to be in short supply of its own, domestically supplied S-400s, and is reportedly considering buying back the two S-400 systems it sold to Turkey in 2017 for $2.5 billion.
Russia has reportedly approached Turkey with a proposal to repurchase the S-400 air defense systems it sold to Ankara in 2019, amid inventory shortages and increasing demand from third countries, Turkish media outlet Nefes reported.
The news was firs... [1905 chars]