Usually flights via airbaltic.com are cheaper than on other travel sites.
However for flights to the Middle East & Central Asia this does not apply & bags are included if booked through any other site than airbaltic.com.

Furthermore, flights from these countries are priced in USD. If you book via an travel agent, this fare is converted at the actual exchange rate, whereas the airBaltic Site converts this to LVL at a somewhat crappy rate.

At my last booking, this made up roughly 10 Euro.