Hmm. Personally I don't think the egg cups are worth listing - if they are in very very good condition, no staining, discoloration or scratches, I suppose you might ask $15 for the pair.

Trays are useful, but the trouble will be the postage - they are heavy things. Possibly you would find it easier to sell them at a market or something. Neither of them are in really good condition - both show wear to the design finish I have suggested. Maybe $20-25 for this one. The other is a more attractive design - maybe $30-35. Bear in mind though that neither are silver, both are electroplate of some kind. You can always reduce a listing price. Certainly 925 Sterling Silver trays have a good value, but that's usually because of their silver weight. Try to find something silver plated, in a  similar condition, that has sold, not something in shiny as new condition.  Just IMO.