Thank you for sharing the links, Dmytro.
I didn't know that these were available online.
Not all of the Agamas that were translated into Chinese are Sarvastivadin. Andrew Skilton (A Concise History of Buddhism
) says that the Ekottara Agama is thought to be Mahasanghika. Bhikkhu Sujato ("What the Buddha Really Taught") places a question mark after the identification "Mahasanghika." A.K. Warder (Indian Buddhism
) argues that the Ekottara is Dharmaguptaka because it states that there are 250 rules for the monks, a number found only in the Dharmaguptaka Vinaya. The Dirgha in Chinese is thought to be Dharmaguptaka (B. Sujato, Warder, Skilton). An incomplete Samyukta is thought to be Kasyapiya (Warder).
For the Sarvastivadins, then, we have 1 Madhyama in Chinese, 1 complete Samyukta in Chinese, and 1 Dirgha in Sanskrit found in Afghanistan, according to Bhikkhu Sujato (Skilton & Warder are aware of the first 2, but the discovery of the Dirgha is too recent for their books to mention).
I hope that this info helps.
EDIT: There is another incomplete Samyukta in Chinese. No one knows where it comes from.