It's not 759, it's 500:

https://www.amazon.com/Siglent-SDS1104X-oscilloscope-channels-standard/dp/B0771N1ZF9/ref=sr_1_1_sspa?dchild=1&keywords=siglent+1104x-e&qid=1590559132&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFVMUg4TVpIWTYwNDUmZW5jcnlwdGVkSWQ9QTAzNDI2OTFYTjJFTldLWFRMMlUmZW5jcnlwdGVkQWRJZD1BMDE1MjQ1MTNTRDRWNUxDQ1BEVDQmd2lkZ2V0TmFtZT1zcF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl

That being said, difference in Poland is about 50$, probably due to different Rigol and Siglent pricing model here.