Your items look like Large Letter size but some of them look heavier than 100g, so I will say that RM gives you a Reference Number on your receipt for 250g LL size. This is an internal RM tracking number, and can be uploaded into your eBay INR cases like regular tracking. Since 2nd Class is 2-days per week now, and since RM shunt 2nd aside as the postage rush increases for the holidays, if it were me I would package LL items so that they weigh more than 100g to get cheapest tracking option. Otherwise I suspect things will only get worse in the coming month or so.