The 5513 is produced for 30 years so there's of course differences. In general I'll say you should buy what you like!! All 5513 will increase in price in the lon run. Then I'll say that condition is everything - why buy a complete package where the watch are in bad shape? Of course, the watch must be great!! Matt dial is more expensive than gloss dial. Some variations demand provenance as the gilt dial version and maxi dial.

All the best,
Claus