Four old paintings

[Верник]

Hello
At the forum the first time. Please help in assessing the value of old paintings. Artworks inherited this part of the collection, which was collected in 20-30th years of distant relatives in bourgeois Latvia. The examination of paintings not done, what is the cost of these pictures without examination?
Picture number 1 - Unsigned, oil on cardboard, size 41h33, creation time (presumably the end of 1919 beginning of 20 century), the state - on the right side with not much worn.

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Picture number 2 - Pavel Sokolov, 1881, the signature is available, teh.izgotovleniya: Cardboard, on a cardboard sheet with a paper drawing (pastel, pencil? Difficult to say).
Never faced with such risunkom.Razmer 38h30, good condition, photos are attached.

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Picture number 3 A.Rylov, presumably beginning of 20 century, teh.izgotovleniya: cardboard on it a piece of paper (watercolor), the size 35h27, the signature is available, good condition, photos are attached.

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Picture number 4 S.Kuvshinnikova (I assume), in 1889, teh.izgotovleniya: watercolor, size 22h15, the signature is, good condition, photos are attached.

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I would be grateful for any help.

[ANTIK]

For the first proposal, $ 1000