If anything is sillier than demanding "original receipts" for purchases on behalf of an organization it must be the idea of doing likewise for "gifts in kind" - especially since many such gifts are of items purchased so long ago that any receipt would probably have faded into illegibility if not actually dissolved into dust. But electoral organizations do have to provide some sort of accounting for such gifts so it may be both useful to develop some capacity for doing so between elections, and also to have some understanding and appreciation of the extent of member contributions beyond the merely financial.
Certainly all member contributions need to be acknowledged and have their importance understood, but this does not require any detailed accounting at the level of requiring receipts or whatever.
And with regard to establishing and enforcing contribution limits, it is important not to place a greater reporting burden on those with smaller individual contributions.
Yes, it is important to be aware of (and hopefully limit) the extent to which wealthy individuals and corporations can influence the outcome of an election by contributing goods and services of high value to their preferred candidates. But we need to do so in a way that does not place a burden on the less wealthy to account for the costs of baking a cake for a potluck that equals or exceeds that placed on a major corporation for those of providing a campaign bus or private jet for their chosen right wing candidate!
Source: gifts in kind - Google Search